Grinder-stone dresser



Sept. 29, 1925.

Filed March 2'7. 1924 2 Sheets-sheet 1 R Y 5 m M u N R Z m MR] A. E 0% a 8 n. {11 I F. E'. RILEY GRiNDER STONE DRESSER Sept. 29, 1925.

Filed March 27. 1924 I 2 Sheets-Sheet 2 INVENTOR FER/LEV 8 n mm m To all whom it Patented Sept, 29, 1925.

UNITED STATES- PA E OFFICE.

ram) n. RILEY, or mvrmnoanmms, MAINE.

GRINDER-STONE DRESSER.

Application filed March 27,1924. Serial No. 702,232. i

I stones used in pulp-making establishments,

and the invention relates to the general class of devices described and claimed in Letters Patent of the United States issued to me on June 4th, 1918, No. 1,268,624, and March 9th, 1920, N0. 1,333,445.

Among the objects of the presentimprovement is to provide a novel construction of main carriage and support therefor, a detachable and interchangeable power device or motor for operating the main carriage to and fro parallel to the surface of the stone, said motor being adapted for use on any number of grinders, one after the other, and to provide a, novel means of manipulating the cross'carriage and means for supporting the burr or burring wheel.

With the foregoing and other objects in 'view the invention consists in the arrangement and combination of parts hereinafter 'described and claimed, and while the invention is not restricted to the exact details of construction disclosed or suggested herein, still for the purpose of illustrating a practical embodiment thereof reference is had to the accompanying drawings, in which like reference characters designate the same parts in the several views, and in which Figure 1 is a plan view of a preferred embodiment of the invention, but with the motor portion in central horizontal section.

Fig. 2 is a partial front elevation and partial longitudinal section on the line 22 of Fi' 1. I I Figs. 3 and 4 are vertical transverse sections on the corresponding lines of Fig. 1. Referring now more specifically to the drawings I show at 10 a suitable base structure secured to and leading upward from which are-brackets 11 constituting for each grinder stone 12 a fixed support for the body 13 of a main carriage 14 adapted to re.- ciprocate'along the top of the body 13 and constituting a cover therefor in all positions, parallel to the face of the stone. Said body may be of any suitable construction or design, but is shown seated in a trough-like seat portion 15 of the bracket structure and with respect to which the body and main carriage are adjustable around an axis par- For this atransverse dove-taileddguide way 19 forha t e cross carriage 2O adapte to move alon same towardand from the stone, and eading forward from the channeled portion 19 is a bracket 21 including a bearing having a top cap 22 connected thereto by means of lag bolts 23 or their equivalent. Said bracket and cap are formed with a smooth cylindrical inner surface 24.

Said cross carriage 20 is provided with a channel or passage way 25in its lower portion and at its upper portion it includes .9. lug or projection 26 through which clamping bolts 27 are projected for co-operation withthe shank 28 which constitutes the carrier or holder for the burr 29 journaled in the forked end thereof in the usual way as upon a pin 30. This shank 28 is provided with a series of holes 31 through any selected two of which the bolts 27 extend according to the approximate adjustment of the burr with respect to the face .of the stone. Extending downward from the top of the cross carriage 20 and into the channel 25 is a nut 32 with which gco-operates the feed screw 33 journaled for rotation in the bracket mechanism 21 and held from endwise movement therein. a

the outer surface mating with the surface 24 with the inner' aforesaid and'co-operatin surface is a bushing 35 having outwardly extending flanges embracin the ends or edges of the sleeve. The bus ing is preferably held from rotation by suitable fingers 36 but permitting the bodily movement. of the bushing toward and from the stone for quick adjustment of the cross carriage. The means shown fo'r effecting such quick set and release of the burr comprises a handle 37 fixed rigidly in the sleeve 34 and extending thence upward radially tlll0l%llll a [cam slot 38 formed in the cap 22. ile the shank of the screw 33 is journaledxin the bushing it is held from endwise movement with relation thereto by means of a collar 39 on the inside and the hub of the hand wheel 40 on the outside. The hand wheel is fixed to the end of the screw shank, and the extreme end of the shank is threaded to receive a clamping handle 41 which when tightened will cause the hub to grip against the non-rotatable bushing 35 thereby locking the screw from unintended rotation.

The operation of this part of the mechanism will be readily understood as follows:

The adjustment of the shank 28 carrying the bumis'determined approximately along the cross-carriage '20 according to the size or diameter of the stone, so as to bring the burr .into proximity to the stone for convenience and subsequent adjustment. The

power adjustment from time to time as the dressing progresses or the stone wears down is effected by means of the power screw 33,

the handle 37 and sleeve being held station- 'aryat such time. During the operation of the dresser burr it-is advanced toward or against the stone b movement of the handle 37 toward :the right as seen in Fig. 1 and after the burr is operated toward the rightacross the face of, the stone it is usually desired to withdraw or release the burr from the stone for the return movement of the main carriage, and this result is obtained by throwing the handle 37 quickly and easily to the left. These movements will of course be understood as being operative in- .dependently of the rotation of the screw.

The pitch of the cam slot is sufliciently low to insure that the burr willbe held by the:

handle in contact with "the wall of the slot wherever it may be left. It will thus be seen that I have provided a combination of the power screw for its usual purpose and a quick set and release device constituting a portionof the same screw mechanism. It

will be noted also that the movement of the f handle 37 at either end ofthe run of the carriage will be toward the direction for the next movement thereof. 1

.The motor or power mechanism for reciprocation of the carriage and dressing mechanism-with respect to the body 13 is A preferably in the nature set forth herein and embodying a cylinder 42 having therein a reciprocating piston 43, the rod'. '44 of which extends through a packin gland 455 in one head 46' of the cylinder. he end of the rod remote from the piston is fitted with ahead 47 seated downward detachably in a socket 48 constituting apart of the main carriage mechanism. Said head fits snugly in the socket with res ectto endwise thrust -and pull but may readily be lifted'therefrom by an upward Iift uponthe motor as awhole and so the motor may be conveyed and attached to; any othergrinder mechanism of the same style. By this arrangement the samemotor may be used on any number of grinders in the same mill. The means shown for detachably securing the motor cylinder in operative position is a .bridle comprising a fixed seat portion 49 constituting-an extension of the body flanged end portion of the cylinder is fitted directly downward while the head 47 of the piston rod enters the socket 48. The bridle includes also a cap 50 hinged at 51 at the boss portion 56 of the hose connection forthe power fluid and thereby the motor is held snugly from rotation as well as from endwise or other relative movement in the bridle. The remote end of the cylinder has 13 and into which the ahead or cap 57 forv closing it and this end of the structure may be supported upon any I suitablelug 58.

The power fluid may be steam, compressed air, or water and is controlled in the. usual manner by means'including a four-waycock I 59 having a handle 60 for manipu tion. With the valve set as in Fig. 1 the power .fluidis admitted in a direction to force the piston and main carriage toward the left.

.No novelty being claimed in the power control mechanism per; se in this case,'it is thought that no further description thereof is necessary.

I claim:

1. In a grinder stone dresser, the combination of a main carriage, means to reciprocate the same to and fro parallel tothe stone to be dressed, a cross carriage mounted upon the main carriage, burr-holding means mounted upon the cross carriage, power means for adjusting the burr-holding means toward the stone, andquick set and release mechanism co-operating with the cross 'carriage for moving the cross carriage and burr-holding means toward and from the face of the stone independently of the aforesaid adjustment.

2. In a grinder stone dresser, the combination with a maih carriage and power means for reciprocating it to and fro parallel to the face of the stone, of a: cross carriage mounted" upon the main ,-carriage and adapted to reciprocate at an angle thereto, a burr-holding means attached to the cross carriage for approximate'jadjustment of the burr, a power screw whose r0- tation effects the power adjustment of the cross carriage, and quick set and. release mechanism for rapid adjustment of the cross carriage associated .with said screw, said mechanism including a bushing, a sleeve journaled thereon and fitted with a projecting part, and a fixed member having a cam co-operating with said projecting part.

3. In a grinder stone dresser, the combination with a main carriage and power means to reciprocateit to and fro parallel to the stone, of a cross carriage mounted to reciprocate upon the main carriage at an angle to the direction of movement of the carriage, a burr mounted upon the cross carriage, a power member for advancing the burr and cross carriage powerfully toward the stone, and quick release means associated with the power member for withdrawing the burr away from the face of the stone, said release means including a portion slotted at an angle to the power member, and a handle co-operating with the power member and slidable in said slot for movement of the member as aforesaid.

4, In a grinder stone dresser, the combination with a main carriage and power means to reciprocate it to and fro parallel to the stone, of a cross carriagemounted to reciprocate upon the main carriage at an angle to the direction of movement of the carriage, a burr mounted upon the cross carriage, a power member for advancing the burr and cross carriage powerfully toward the stone, and quick release means asso-' ciated with the power member for withdrawing the burr away from the face of the stone, said power member being'a rotatable screw, a flanged bushing in which the screw is journaled, and the quick release means including a sleeve journaled on said bushing and fitted with a handle extending therefrom and co-operating with a fixed member having a cam.

5. In a grinder stone dresser, a main carriage, power means 'to reciprocate the carriage to and fro parallel to the stone, a

supporting body along which the carriage reciprocates, and supporting means for the body providing for tilting adjustment of the body and carriage around an axis parriage to and .fro parallel to the stone, a

supporting body along which the carriage reciprocates, and supporting means for the body providing for tilting adjustment of the body and carriage around an axisparallel to this line of movement, said support-- ing means including a pair of seats and bolt and slot means between thebody and .said seats for clampin the body in adjusted position with respect to the seats,

said motor including a reciprocating piston having arod connected to one end of the carriage and detachable therefrom by an upward movement of the entire motor, and means to hold the motor while in operation from upward movement.

7. In a grinder stone dresser, a main car-. riage, power means to reciprocate the carriage to and fro parallel to the stone, a supporting body along which the carriage reciprocates, and supporting means for the body providing for tilting adjustment of the body and' carriage around an axis parallel to this line of movement, said supporting means including a pair of seats and bolt and slot means between the body and ture.

FRED E. RILEY. 

